JP3205256B2 - Electric horn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric horn used for automobiles and the like.

[0002]

2. Description of the Related Art The structure of a conventional electric horn 10 will be described with reference to FIGS. Reference numeral 12 denotes a container, which has a disk-like outer shape, and has a concave portion 14 for accommodating an electromagnetic coil, which will be described later, in the center thereof. The recess 14 is provided with a through hole 16.
A cylindrical portion 18 protrudes from the edge of the container 6 toward the inside of the container 12. A female screw is formed on the inner surface of the cylindrical portion 18, and a core 20 having a male screw formed on the outer peripheral surface is screwed to a lower portion of the cylindrical portion 18. Numeral 22 denotes an electromagnetic coil, which is a bobbin 28 having flanges 26 formed at both ends of a cylindrical body 24.
An electric wire 30 is formed by winding. Electromagnetic coil 2
2 has a cylindrical portion 1 in a center hole 32 of the cylindrical body 24 of the bobbin 28.
8 is housed in the recess 14.

Reference numeral 34 denotes a diaphragm, which is an opening 3 of the container 12.
6 and forms a closed space, and vibrates when the electromagnetic coil 22 is excited. Reference numeral 38 denotes a resonance plate, which is provided on the front surface (upper side in FIG. 4) of the vibration plate 34 and resonates with the vibration plate 34. An armature 40 is attached to the vibration plate 34 and has a lower end inserted into the center hole 32 of the bobbin 28. Reference numeral 42 denotes a fixing plate, which is bridged over the upper surface of the bobbin 28 of the electromagnetic coil 22 housed in the concave portion 14, and both ends of which are fixed to the edge of the concave portion 14 of the container 12 with rivets 44. 22 is fixed. Reference numeral 46 denotes an interrupter, which has a function of intermittently supplying a current to the electromagnetic coil 22. With this interrupter 46,
When the electromagnetic coil 22 is intermittently excited, the armature 40 moves toward and away from the core 20, the diaphragm 34 vibrates, and the electric horn 10 sounds.

[0004]

However, the above-mentioned conventional electric horn has the following problems. Container 12
Fixing plate 4 used to fix the electromagnetic coil 22 to the
2 needs to be fixed to the container 12 by the rivets 44, so that the number of parts is increased by the rivets 44 and the fixing plate 42, so that the parts cost is increased and the assembly takes time.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electric horn which can reduce the number of parts and can be assembled in a short time.

[0006]

The present invention has the following arrangement to achieve the above object. That is, a container accommodating an electromagnetic coil formed by winding an electric wire around a bobbin having a flange portion formed at both ends of a cylindrical body, and a closed space that covers the opening of the container to form a closed space. A vibrating plate that vibrates, wherein the bobbin is provided in the center hole of the cylindrical body of the bobbin, and a cylinder protruding inwardly of the container from an edge of a through hole provided at a storage position of the electromagnetic coil of the container. In an electric horn which is fitted by fitting a part,
The tip is enlarged in diameter, and a circumferential surface is
Equipped with one or more steps extending in the direction
And the tip of the enlarged cylindrical portion is engaged with the step portion.
Wherein the bobbin is attached to the container .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an electric horn according to the present invention will be described below in detail with reference to the accompanying drawings. The same components as those described in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. First, the configuration of the electric horn 50 will be described with reference to FIG. The configuration is substantially the same as that of the electric horn 50 of the conventional example, and a concave portion 1 for accommodating the electromagnetic coil 22 is provided at the center of the container 12.
4 are provided. A through hole 16 is provided at the center of the bottom surface of the concave portion 14, and a cylindrical portion 18 projects from the edge of the through hole 16 toward the inside of the container 12. The cylindrical portion 18 is fitted into the center hole 32 of the bobbin 28, and the electromagnetic coil 22 is housed in the concave portion 14. On this occasion,
The flange 26 below the bobbin 28 is in close contact with the bottom of the recess 14.

Next, the electromagnetic coil 2 which is a feature of the present invention is described.
The structure for attaching the second container 2 to the container 12 will be described with reference to FIG. In the present invention, when attaching the electromagnetic coil 22 to the container 12, the tip of the cylindrical portion 18 inserted into the center hole 32 of the bobbin 28 without using the fixing plate 42 and the rivet 44 as in the conventional example (see FIGS. 2), the leading end thereof is engaged with the inner surface of the center hole 32, and the container 12
And the bobbin 28 is fixed to this. As a result, the electromagnetic coil 22 is irremovably attached to the recess 14. The engagement structure between the tip of the cylindrical portion 18 and the inner surface of the center hole 32 is formed on the inner surface of the center hole 32 on the side of the through hole 16 as shown in FIG. One or two or more steps 52 may be extended toward the end, and the tip of the enlarged cylindrical portion 18 may be bent over the upper surface of the steps 52 so as to engage with the steps 52. In the present embodiment, one step portion 52 is provided over the entire inner periphery of the center hole 32. However, the step portion 52 may be separately formed into a plurality of steps such as two or three.

In order to fix the electromagnetic coil 22 to the container 12, the diameter of the tip (the upper end in FIGS. 1 and 2) of the cylindrical portion 18 is increased as shown in FIG. A column-shaped (for example, a column-shaped) jig 56 having a tapered surface 54 formed on the side surface on the distal end side, such as a punch, is inserted into the center hole 32 of the bobbin 28 from the opposite direction to the cylindrical portion 18, A method in which the surface 54 is brought into contact with the inside of the tip of the cylindrical portion 18 and pressed to expand the diameter may be adopted. Further, in the above-described embodiment, the flat electric horn having the resonance plate 38 has been described as an example. However, in the case of the spiral electric horn not using the resonance plate, similarly, the inside of the concave portion 14 of the container 12 is similarly provided. The electromagnetic coil 22 can be fixed to the container 12 by enclosing the electromagnetic coil 22 and increasing the diameter of the distal end of the cylindrical portion 18.

Although the preferred embodiments of the present invention have been described in various ways, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

[0011]

When the electric horn according to the present invention is used,
When fixing the electromagnetic coil to the container, it is not necessary to fix the fixing plate with rivets as in the conventional example, and the number of parts can be reduced by the rivet and the fixing plate, so that the component cost can be reduced and the jig can be reduced. For example, the fixing can be performed in a single operation, so that the operation time required for the fixing can be shortened.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing the internal structure of an electric horn according to the present invention.

FIG. 2 is an enlarged view of a main part showing a fixing structure of the electromagnetic coil of FIG. 1 and a method of expanding the diameter of the tip of a cylindrical portion.

FIG. 3 is a plan view of the inside of a container showing a structure for fixing an electromagnetic coil of a conventional electric horn.

FIG. 4 is a front sectional view showing the internal structure of FIG. 3;

[Description of Signs] 12 Container 16 Through-hole 18 Cylindrical part 22 Electromagnetic coil 24 Cylindrical body 26 Flange part 28 Bobbin 30 Electric wire 32 Center hole 34 Vibration plate 38 Resonance plate 50 Electric horn

Claims (1)

(57) [Claims] 1. A container for housing an electromagnetic coil formed by winding an electric wire around a bobbin having a flange formed at both ends of a cylindrical body, and a closed space that covers an opening of the container to form a closed space. A vibrating plate that vibrates by excitation of the bobbin, wherein the bobbin is provided in the center hole of the cylindrical body of the bobbin so as to protrude inward from the edge of a through hole provided at the storage position of the electromagnetic coil of the container. In the electric horn to which the cylindrical portion is fitted and attached, the distal end of the cylindrical portion is enlarged in diameter, and extends along the circumferential direction on the inner surface of the center hole on the through-hole side.
One or two or more stepped portions, and the front end of the enlarged cylindrical portion is engaged with the stepped portion and
An electric horn, wherein the bobbin is attached to the container .